Chain pipe-wrench.



No. 769,042. PATENTED AUG. 30, 1904- G. AMB'ORN & G. W. BUPPORD.

CHAIN PIPE WRENCH.

APPLICATION FILED APR. 19, 1904.

N0 MODEL.

WITNESSES.-

' ATTORNEY "PATENTED AUG. .30, 1904 I WITNESSES;

No. 769,042. PATENTED AUG, so, 1904. I -G.AMBORN& G. W.'BUFFORD.'I v

CHAIN PIPE WRENCH.

APPLICATION FILED APR. 19, 19051.

NO MODEL. 3 Bl zzard-sun a.

iiiiiilunafii mam/Mr 'jaw.

I UNITED j STATES Patented August 3C), 1904.

; PATENT OFFICE.

GEORGE AMBORN AND GEORGE W. BUFFORD, OF NEW YORK, N. Y., ASSIGNORS TO J. H. WILLIAMS & COMPANY, OF BROOKLYN, NEW YORK, A'CORPORATION OF NEW YORK.

CHAIN PIPE-WRENCH.

SPEUIFICATION forming part of Letters Patent No. 769,042, dated'August 30, 1904.

Application filed A ril 19, 1904..

turning such articles as pipes and pipe-collars. These wrenches in general perform their gripping function by engaging the pipe or similar article between a fixed part or jaw of the wrench and a chain which serves to maintain the pipe in close relation to said That part of the wrench upon which the jaw-is fixed may for convenience be called the head. The head is conveniently at tached to a handle. There are provided means for securing the ends of the chain against motion in order that it may properly coact with the gripping-surface, as above described.

Our invention more particularly consists in certain improvements affecting the relation between the chain and the points of engagement which secure it against motion.

. We may best describe our improvements by referring to the accompanying drawings, which illustratecertain preferred forms.

In the drawings, Figure 1 is a side view of a wrench which has a pair of gripping-jaws oppositely disposed upon its head. It is shown gripping a pipe. .Fig. 2 is a top view of this wrench. Fig. 3 is a sectional view of the wrench along the line 3 3 of Fig. 2. Fig. 1 is a sectional View of the wrench along the line 4 4 of Fig.2. Fig. 5 is a partial side sectional view showing a modification of the association of parts assumed in Figs. 1, 2, and 3. Fig. 6 is a top View of a Wrench embodying our invention which employs coacting gripping-surfaces. Fig. 7 is a sectional view along the line7 7 of Fig. 6. Fig. 8 is a top view of a portion of the chain conveniently employed in the wrench shown in Figs. 6 and 7, said Serial No.. zoasso. (No model.)

chain presenting certain modifications of the chain shown in Figs. 1, 2, and 3.

For convenience of description the wrenches shown. in the drawings may each be divided into four parts-a handle A, a head B, a chain 0, and gripping-surfaces D.

The handle A may be of any convenient form. It may be integral with the head B of the wrench, as shown in Figs. 1, 2, and 3, or it may be made separately and attached to the head in any convenient manner fOr eXampIe, as shown in Fig. 5 and in Figs.v 6 and 7.

The head B may be of any serviceable form,

those shown in the drawings being selected as.

Fi s. 6' and 7 these arts bearin gri in 3 I b 6 surfaces 1), which areadapted to coact in pairs. In this case also these gripping-surfaces D maybe formed integrally with the head or they may be severally or collectively removable.- A head having a double series of grip ping-surfaces similar to those shown in Figs. 6 and 7 might conveniently be made in one piece instead of inseparable parts. More over, both parts ofthe head (shown in Figs. 6 and 7) might be made integral with the handle fications might be applied in this connection general scope of our invention. The single other article;

The chain C may be of any convenient-form, but is preferably of the flat-link single-course double-acting type and has projecting pintles throughout its length. At each end it bears a stop 0 of such size or shape that it will not pass It is readily apparent that various modithrough a passage in which any other part of the chain may be moved easily. In Figs. 1, 2, and 3 the stop 0 is shown in a cylindrical form equal in length to the chain-pintles. but of such diameter that it would be denied passage through a slot in which the said pintles would be easily received. In Figs. 6,7. and 8 the stop 6 is shown conveniently in cylindrical form equal in diameter to the chain-pintles, but of greater length, thereby being impossible of passage through an aperture which is but slightly wider than the length of a chainpintle. The stop 0 may be of any sort which will comply with the requirements set forth above, those shown herewith being merely preferred forms. The wrench is provided with a central transverse passage (1 of such character as to permit the chain C to slip easily through it until arrested by either of the stops 0, which are of such size or shape as to be denied entrance into said passage. This passage is closed on all of its sides, but is open at both ends. It is located back of the grip-faces on the head and is central with respect to a plane which bisects the grip-faces of the single head or is intermediate between the pair of gripfaces shown in Figs. 6 and 7.

At the extremities of the passage (Z are seats 0 for the stops 0. These seats a receive the stops cand maintain them firmly in position against the stress applied 'to the chain in the performance of its gripping function. It is apparent that either end of the chain may be engaged in this way upon opposite sides of the passage (Z, so that by the simplest adjustment the chain may be drawn from one face of the wrench to the other. In this manner one end of the chain is secured against motion during use of the wrench. The passage (Z furnishes space for the sliding movement of the body of the chain, and it has communicating lateral grooves in which the projecting pintles travel. It is necessary, further, that the other end of the chain be fixed against movement in order that the chain may be retained in its proper position, encircling the pipe to be gripped and maintaining said pipe in its proper relation to the gripping-surface on the head of the wrench. For this purpose the wrench is equipped with locks f for the free end of the chain. They are preferably given the form of spaced hooks arranged in pairs to cooperate in retaining one of the projecting pintles of the single-course chain C. which extends through the space between the hooks. Two pairs of locks f f are provided on the wrench oppositely disposed on both faces of the wrench to correspond with the gripping-surfaces D. The locks are located behlndthe chain-passage, so that the entire extent of the grip-faces on both sides are available for gripping purposes. Inasmuch as eitherend of the chain C may be engaged and secured in position by a seat a, it is desirable that whichver end is so secured the .ings, the type having a single head, Fig. 1

other end shall also be capable of engagement at some point. This object is attained by the arrangement of parts already described and shown with particular clearness in Fig. 1. The above remarks apply with equal force to both types of wrench shown in the present drawand the type having a double head, Fig. (l. The locks ff (shown in Figs. 6 and 7) are built into the two separated head-pieces B of that wrench. Obviously these might be formed integrally with the handle and might be located at various points other than the positions which they are here shown to occupy, so long as they permit the cooperation of the chain with the opposite grip-faces. This observation is true in regard to the locks f f shown in the other figures. For example, the locks shown in Fig. 5 might be integral with the handle A. Any modification such as we here suggest would in no way avoid our present invention. The locksf'f are conveniently spaced apart a sufiicient distance to permit the easy introduction of the chain between them, as shown in Fig. 2.

The gripping-surfaces Dare preferred to be in the form of serrated jaws, as shown in the present drawings. In Figs. 1. 2, 3, 4, and 5 the gripping-surfaces D are given the form of independent removable jaws. One form possible for these jaws and a convenient mode of attachment to the head are clearly shown and described in a companion application thereto of Amborn and Chase, liled concurrently herewith, Serial No. 203,877. These jaws might be on a single wrench composed of a single piece bearing two separately serrated surfaces. Separable jaws I), such as are shown in Figs. 1 and 3, are particularly desirable when the handle and head of the wrench are formed integrally for reasons set forth in the above-named Amborn and Chase application which are unnecessary to be enumerated here. The style, form, mode of attachment, and general character of these gripping-surfaces D might be altered in a great number of ways without necessitating any removal from the proper field of our invention.

The advantages accruing from the use of the wrench we have described are many. Either end of the chain may be engaged against movement automatically. \Vith an end-to-end reversible double-acting chain we have combined very simple and effective means for permitting the successive use of all portions of the chain. The wrench can be used either side up, and if it be found inexpedient or inconvenient to throw the chain of the wrench over the pipe to be gripped it may be turned under the .pipe by merely drawing the chain through its passage without reversing the thefacesof' thehandle and that the-transverse chain-passage-is central both with respect to the grip-faces andto the locks it follows that when a flat-link single-course double-acting chain is employed either grip-face can be used throughout the length of the chain, all portions of the chain can be used by using first one and then the other, thus lengthening the life-of the chain.

We claim as our invention 1. A chain pipe-wrench having, in combination, a handle, a single head at the end of said handle having oppositegrip-faces substantially in line with the faces of the handle, a central transverse chain-receiving passage closed at all of its sides and open at its ends, said passage having communicating lateral grooves and having seats near its opposite ends, and said passage being back of the grip faces of the head, spaced locks on both faces of the wrench behind said passage, and a double-acting fiat-link single-course sliding chain adapted to slide freely through said passage from end to end, said chain having projecting pintles throughout its entire length cooperating with said locks, said pintles traveling in said lateral grooves'of the chain-passage, and said chain also having stops at opposite ends which cannot pass through said passage, each of which stops is adapted'to fit in one of said seats, whereby said chain and either of said grip-faces may squarely gripan article between them.

2. A chain pipe-wrenchhaving, in combination, a handle, a single head at the end of said handle, havingopposite grip-faces substantially in line with the-faces oftheh'andle,

a central transverse chain-receiving passage" closed at'all of its sides and open-at 1ts ends,

said passage having communicating'lateral grooves and said passage being back of the grip-faces of the head, spaced locks on both faces of the wrenchbehind said passage, and a double-acting flat-link single-course sliding chainadapted to slide freely through said passage from end to end, said chain having projecting pintles cooperating with said locks, said pintles traveling in said lateral grooves of the chain-passage, and said chain'also hav ing stops at opposite ends which cannot pass through said passage, whereby said chain and either-of said grip-faces may squarely grip an article between them.

3. A chain pipe-wrench having, in combination, a handle, a single head at the end of said handle', having opposite grip-faces substantially in linewith the faces of the handle, a central transverse chain-receiving passage closed at all of its sides and open at its ends, said passagebeingbackof the grip-faces of the head, spaced locks on both faces" of the wrenclrbehin'd said passage, and a double act I ing flat-link single-course sliding chain adapt" ed to, slide freely through said passage from endto' end, said chain having projecting pintles cooperating with said locks, and said chain also having stops at opposite ends which can- 'not pass through said passage, whereby said chain and either of said grip-faces may squarelygrip an article between them.

4'. A chain pipe-wrench having, in combiing lateral grooves and having seats near its opposite ends, spaced locks on both faces of the Wrench behind said passage, and a doubleacting flat-link single course sliding chain nation, a handle, a head at the end of said han dle having opposite grip-faces, a transverse '"cliainrece1v1ng passage closed at all of its sides and open at 1ts ends, said passage hav- 1 adapted to slide freely through said passage from end to end, said chain having projecting pintles cooperating with said locks, said pin tles traveling in said lateral grooves of the chain-passagaand said chain also having stops at opposite ends which cannot pass through a said passage, each of which stops is adapted to fit in one of said seats.

5. A chain pipe-wrench having, in combination, a handle, a head at the end of said handle having opposite grip-faces, a transverse chainreceiving passage closed at all of its sides and open at its ends, said passage having lateral grooves, spaced locks on both faces of the wrench behind said passage, and

a double-acting flat-link single-course sliding chain adapted to slide freely'through'said IOO passage from end toend, said chain having projecting pintles cooperating with said locks, said pintles traveling in said "lateral grooves of thechain-passage, and said chain also hav ing stops at opposite ends which cannot pass through said passage.

6. A chain pipe-Wrench having, in combi' nation, a handle, a head at the end of said handle having opposite grip-faces, a' transverse chain-receiving passage closed'at all of its sides and open at itsends, spaced locks on both faces of the wrench behind said passage, and a double-acting flat-link single-course sliding chain adapted to slide freely through said passage from end to end, said chain having projecting pintles cooperating with said locks, and said chain also having stops at opposite ends which cannot pass through said passage.

7. A chain pipe-wrench having, in combination, a handle, a head at the end of'said handle having opposite grip-faces, a transverse chain-receiving passage having seats near its opposite ends, said passage being back of the head, a lock on each face of the 'wrench behind said passage, and a double-actingsliding chain adapted to slide freely through said passage from end to end, said chain cooperating j with either of said locks and having a stop at each end which cannot pass through said passage, each stop being adapted to cooperat dle having opposite grip-faces, a transverse chain-receiving passage back of the head, a lock on each face of the wrench behind said passage, and a double-acting sliding chain adapted to slide freely through said passage from end to end, said chain cooperating with either of said locks and having a stop at each end which cannotpass through said passage.

9. A chain pipe-wrench having, in combination, a handle, a head having opposite gripfaces, a chain-receiving passage, a lock on each face of the wrench, and a double-acting sliding chain adapted to slide freely through said passage from end to end, said chain cooperating with either of said locks and having a stop at each end which cannot pass through said passage.

10. A chain pipe-Wrench having, in combination, a handle, a head having a grip-face, a transverse chain-receiving passage, a lock hehind the chain-receiving passage and a sliding chain adapted to slide freely through said passage t'rom end to end, said chain cooperating near one end with said lock and having a stop at its opposite end which cannot pass through said passage.

In testimony whereof we affix our signatures in presence of two witnesses.

GEORGE AMBORN. GEORGE W. BUFFORD.

Witnesses:

MORTIMER J. TRAVIS, WILLIAM H. ANDERSON, Jr. 

